HIGH RESOLUTION CHRONOLOGY USING ROCK MAGNETIC CYCLOSTRATIGRAPHY IN THE BAZA BASIN, SOUTHERN SPAIN

AbstractCARMENES is a pair of high-resolution (R ≳ 80, 000) spectrographs covering the wavelength range from 0.52 to 1.71 μm with only small gaps. The instrument has been optimized for precise radial velocity measurements. It was installed and commissioned at the 3.5 m telescope of the Calar Alto observatory in Southern Spain in 2015. The first large science program of CARMENES is a survey of ~300 M dwarfs, which started on Jan 1, 2016. We present an overview of the instrument, and provide a few examples of early science results.

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High-resolution architecture of late Holocene highstand prodeltaic deposits from southern Spain: the imprint of high-frequency climatic and relative sea-level changes

Continental Shelf Research ◽

10.1016/s0278-4343(03)00120-1 ◽

2003 ◽

Vol 23 (11-13) ◽

pp. 1037-1054 ◽

Cited By ~ 37

Author(s):

L FERNANDEZSALAS

Keyword(s):

High Resolution ◽

Sea Level ◽

High Frequency ◽

Late Holocene ◽

Southern Spain ◽

Sea Level Changes ◽

Relative Sea Level

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High-Resolution Temperature Variability Reconstructed from Black Pine Tree Ring Densities in Southern Spain

Atmosphere ◽

10.3390/atmos11070748 ◽

2020 ◽

Vol 11 (7) ◽

pp. 748

Author(s):

Jan Esper ◽

Claudia Hartl ◽

Ernesto Tejedor ◽

Martin de Luis ◽

Björn Günther ◽

...

Keyword(s):

High Resolution ◽

Tree Ring ◽

Volcanic Eruptions ◽

Temperature Variability ◽

Southern Spain ◽

Black Pine ◽

Early 19Th Century ◽

Pine Tree ◽

Natural Park ◽

Reconstructed Temperature

The presence of an ancient, high-elevation pine forest in the Natural Park of Sierras de Cazorla in southern Spain, including some trees reaching >700 years, stimulated efforts to develop high-resolution temperature reconstructions in an otherwise drought-dominated region. Here, we present a reconstruction of spring and fall temperature variability derived from black pine tree ring maximum densities reaching back to 1350 Coefficient of Efficiency (CE). The reconstruction is accompanied by large uncertainties resulting from low interseries correlations among the single trees and a limited number of reliable instrumental stations in the study region. The reconstructed temperature history reveals warm conditions during the early 16th and 19th centuries that were of similar magnitude to the warm temperatures recorded since the late 20th century. A sharp transition from cold conditions in the late 18th century (t1781–1810 = −1.15 °C ± 0.64 °C) to warm conditions in the early 19th century (t1818–1847 = −0.06 °C ± 0.49 °C) is centered around the 1815 Tambora eruption (t1816 = −2.1 °C ± 0.55 °C). The new reconstruction from southern Spain correlates significantly with high-resolution temperature histories from the Pyrenees located ~600 km north of the Cazorla Natural Park, an association that is temporally stable over the past 650 years (r1350–2005 > 0.3, p < 0.0001) and particularly strong in the high-frequency domain (rHF > 0.4). Yet, only a few of the reconstructed cold extremes (1453, 1601, 1816) coincide with large volcanic eruptions, suggesting that the severe cooling events in southern Spain are controlled by internal dynamics rather than external (volcanic) forcing.

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Mesozoic formation of pyroxenites and gabbros in the Ronda area (southern Spain), followed by Early Miocene subduction metamorphism and emplacement into the middle crust: U–Pb sensitive high-resolution ion microprobe dating of zircon

Tectonophysics ◽

10.1016/s0040-1951(99)00256-5 ◽

2000 ◽

Vol 316 (1-2) ◽

pp. 19-44 ◽

Cited By ~ 110

Author(s):

Lourdes Sánchez-Rodrı́guez ◽

Dieter Gebauer

Keyword(s):

High Resolution ◽

Southern Spain ◽

Early Miocene ◽

Ion Microprobe ◽

Middle Crust

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Holocene vegetation and climate change recorded in alpine bog sediments from the Borreguiles de la Virgen, Sierra Nevada, southern Spain

Quaternary Research ◽

10.1016/j.yqres.2011.09.006 ◽

2012 ◽

Vol 77 (1) ◽

pp. 44-53 ◽

Cited By ~ 58

Author(s):

Gonzalo Jiménez-Moreno ◽

R. Scott Anderson

Keyword(s):

Climate Change ◽

Magnetic Susceptibility ◽

High Resolution ◽

Sierra Nevada ◽

High Elevation ◽

High Impact ◽

Southern Spain ◽

Pollen Record ◽

Arboreal Pollen ◽

Vegetation And Climate

High-resolution pollen and magnetic susceptibility (MS) analyses have been carried out on a sediment core taken from a high-elevation alpine bog area located in Sierra Nevada, southern Spain. The earliest part of the record, from 8200 to about 7000 cal yr BP, is characterized by the highest abundance of arboreal pollen andPediastrum, indicating the warmest and wettest conditions in the area at that time. The pollen record shows a progressive aridification since 7000 cal yr BP that occurred in two steps, first shown by a decrease inPinus, replaced by Poaceae from 7000 to 4600 cal yr BP and then by Cyperaceae,Artemisiaand Amaranthaceae from 4600 to 1200 cal yr BP.Pediastrumalso decreased progressively and totally disappeared at ca. 3000 yr ago. The progressive aridification is punctuated by periodically enhanced drought at ca. 6500, 5200 and 4000 cal yr BP that coincide in timing and duration with well-known dry events in the Mediterranean and other areas. Since 1200 cal yr BP, several changes are observed in the vegetation that probably indicate the high-impact of humans in the Sierra Nevada, with pasturing leading to nutrient enrichment and eutrophication of the bog,Pinusreforestation andOleacultivation at lower elevations.

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